Added module for generating RMG-Java style kinetics libraries from chemkin file.

Replicates capabilities of Amrit's bash scripts.
Added web module for merging 2 RMG models to give a single chemkin file.
Added additional comment about prioritization for merging models.
In thermo search, print groups used for group additive thermo estimation.
Display symmetry number in thermo search entries for Benson group additivity.